EP3356618A1

EP3356618A1 - Construction support

Info

Publication number: EP3356618A1
Application number: EP16774951.4A
Authority: EP
Inventors: Werner Handvest
Original assignee: Doka GmbH
Current assignee: Doka GmbH
Priority date: 2015-10-01
Filing date: 2016-09-30
Publication date: 2018-08-08
Anticipated expiration: 2036-09-30
Also published as: US20180223551A1; DK4039913T3; US10190328B2; FI4039913T3; WO2017055559A1; EP4039913A1; DE102015219043A1; EP4039913B1; EP3356618B1; DK3356618T3

Abstract

The invention relates to a construction support (2) comprising an outer tube (10) extending in a longitudinal direction (4), and an inner tube (12) arranged therein, extending in the longitudinal direction (4), adjustable in relation to the outer tube (10) in the longitudinal direction (4) and having an outer thread (20), characterised in that: the outer tube (10) is an uneven rolled tube; the outer tube (10) is provided with at least one guide groove (18) during roll-production, said guide groove extending in the longitudinal direction (4) and being open in the radially inward direction; the inner tube (12) is a round tube and has at least one guide element (24) protruding radially outwards, which engages in the radially inwardly open guide groove (18), such that the inner tube (12) is interlockingly anti-rotationally arranged in the circumferential direction (6) in the outer tube (10); an adjustment nut (14) is arranged in a longitudinal end region (16) of the outer tube (10) in a captive manner, yet such that it is rotatable in the circumferential direction (6), said adjustment nut having an inner thread (28) that can be screwed together with the outer thread (20) of the inner tube (12); and, by rotating the adjustment nut (14), the inner tube (12) can be adjusted in the longitudinal direction (4) relative to the outer tube (10), wherein the guide element (24) slides in the guide groove (18).

Description

Title: prop

description

The invention relates to a prop, with an axial longitudinal direction, a concentric circumferential direction and a radial direction, with a longitudinally extending outer tube, disposed therein in the

Longitudinally extended and with respect to the outer tube in the longitudinal direction adjustable inner tube with an external thread.

Such props are widely known. The present invention has for its object to provide a prop that is stable and easy to use handled and inexpensive to produce.

This object is achieved erfindungsgeraäß in a prop of the type mentioned fact that the outer tube is a non-circular rolled tube that the outer tube is provided in the course of rolling production with at least one longitudinally extending and radially inwardly opening guide groove that the Inner tube is a round tube and

has at least one radially outwardly projecting guide element, which in the radially inward open

Guide groove engages, so that the inner tube thereby in

Circumferentially positively against rotation in the outer tube is arranged, and that in a longitudinal end of the

Outer tube an adjusting nut with a screwed to the external thread of the inner tube internal thread captive, but is rotatably arranged in the circumferential direction, and that by rotating the adjusting nut, the inner tube is adjustable relative to the outer tube in the longitudinal direction, wherein the guide member slides in the guide groove.

According to the invention, the outer tube is produced inexpensively in a rolling process. In the course of the rolling process, the tube is provided with the at least one radially inwardly opening and longitudinally extending guide groove. Due to the guide groove, the outer tube to a non-circular profile Recording of the guide element. As a result, an anti-rotation of the inner tube is realized in the outer tube.

In the inventive construction of the prop, the adjustment of the inner tube in the longitudinal direction relative to

Outer tube, and thus the longitudinal adjustment of the prop, by turning the adjusting nut. The inner tube is characterized

translationally adjusted in the longitudinal direction relative to the outer tube, wherein the guide element of the inner tube slides axially in the guide groove of the outer tube. At the same time, the inner tube is fixed in the axial longitudinal direction by the adjusting nut, and an undesirable translational input or

Failure of the inner tube in or out of the outer tube is reliably prevented.

It proves to be particularly advantageous if the outer tube made of a steel alloy and for protection against

Corrosion is preferably galvanized.

The inner tube is preferably made of a steel alloy. It proves to be advantageous if the inner tube is also produced in a rolling process and in galvanized design.

The external thread of the inner tube is advantageously in a non-cutting shaping method, in particular a

Thread rolling method or a thread rolling method, manufactured. It proves to be particularly advantageous that the outer tube comprises a plurality, preferably two, three or four, extending in the longitudinal direction guide grooves, and that the inner tube accordingly several, preferably two, three or four, engaging in these guide grooves

Having guide elements. By engaging in the guide grooves guide elements, the inner tube in

Circumferentially arranged rotation in the outer tube.

The guide element of the inner tube can be realized in many ways. It is conceivable that the guide element is formed by adding material, for example by welding wing-like expansion elements.

Preferably, the guide element is formed by a radially outwardly directed deformation of material of the inner tube, for example by punctiform material deformation in the form of a radially outwardly pressed wart. According to a preferred embodiment, the guide element

integrally formed from the material of the inner tube by cutting and radially outward expansion or bending.

In a further preferred embodiment that is

Guiding element of at least one, preferably two, pins formed. The pins are inserted through a respective opening in the inner tube and project radially outward. In order to ensure an axial adjustability of the inner tube relative to the outer tube over the greatest possible path length, it proves to be advantageous for the outer thread of the inner tube to extend over the largest possible length of the inner tube.

Furthermore, it proves to be particularly advantageous that the guide element is formed in or on a arranged in the outer tube longitudinal end region of the inner tube. Preferably, this longitudinal end region of the inner tube extends from an end of the inner tube arranged in the outer tube over 30 cm in the longitudinal direction and the guide element is within the

Longitudinal end region arranged.

To prevent inadvertent unscrewing of the adjusting nut

prevent, it is conceivable that the external thread of

Inner tube is limited by a welding point or pinch. In a preferred embodiment, a thread-free part is provided on the inner tube. In particular, that ends

External thread in a range of at least 30 cm before the end of the inner tube.

As mentioned above, the adjusting nut is arranged captive on the outer tube. According to a preferred embodiment, the adjusting nut is by means of a securing element in the axial direction positively, but with play and circumferentially rotatably mounted on the outer tube. The

Securing element is preferably in the axial direction positively held on the outer tube. It is conceivable that the securing element is held, for example, by cohesive bonding, on the outer tube.

The securing element can be realized in various ways and can be shaped differently, for example, U-shaped. Advantageously, however, the securing element is a retaining ring comprising the outer tube.

In a particularly preferred embodiment, the outer tube in the longitudinal end region on a support portion for conditioning of the securing element from axially below. The support portion can be realized in various ways, in particular by adding material, for example by welding on wing-like or annular expansion pieces.

Preferably, the support portion is formed by a radially outwardly directed deformation of material of the outer tube. Particularly preferred is the support section

in one piece from material of the outer tube, preferably formed by cutting and bending. It is quite conceivable that the adjusting nut is seated on the support section of the outer tube from the top axially.

After insertion of the inner tube in the outer tube, the

Adjusting nut positively connected to the fuse element. Advantageously, the securing element has at least one radially inwardly into an axial rear grip position with the adjusting nut foldable approach. It is conceivable that the radially inwardly foldable approach of the securing element is crimped with an edge of the adjusting nut. Preferably, the radially inwardly foldable approach engages in one

Circumferential groove of the adjusting nut a positive fit.

In a further preferred embodiment, the longitudinal end region of the outer tube itself forms a securing element for the adjusting nut. The longitudinal end region has foldable means for this purpose. It is conceivable that the convertible means are formed by adding material, for example by welding flange-like sections. Preferably, the convertible means are integrally formed from a radially outwardly directed deformation of the material of

Outside tube formed.

According to a preferred embodiment, the foldable means of the longitudinal end region are at least one radially outwardly projecting portion with at least one radially inwardly convertible into an axial rear grip position with the adjusting nut approach. Preferably, the radially inwardly foldable approach engages in a circumferential groove of the adjusting nut.

Furthermore, it proves to be particularly advantageous if the adjusting nut several, preferably three or four,

Tool attachment points, in particular wing-like

Hammer stop surfaces, includes. For the appropriate use of the prop it proves to be advantageous if the outer tube and the inner tube a

Have receptacle for a foot plate and a top plate and the foot and head plate is formed such that another foot and head part, in particular centrally, can be attached thereto.

Preferred developments are described in the dependent claims, for which in any combination protection in

Claimed. Details emerge from the drawings and the following description of a preferred embodiment of the prop of the invention. In the drawing shows:

Figure 1 shows a detail of a side view of

Construction support according to the invention according to a preferred embodiment;

Figure 2a is a side view of an outer tube;

Figure 2b shows a cross section through an outer tube;

Figure 2c is a detail view of an outer tube;

Figure 3a is a side view of an inner tube;

Figure 3b shows a cross section through an inner tube; FIG. 3c shows a cross section through an inner tube according to a further embodiment;

Figure 4a is a side view of a control nut according to a preferred embodiment;

Figure 4b is a plan view from the axial direction on a

Adjusting nut according to Fig. 4a;

Figure 5 is a sectional side view of a

inventive prop;

Figure 6a is a side view of a securing element according to a preferred embodiment, and

Figure 6b is a plan view from the axial direction on a

Securing element according to FIG. 6a;

FIG. 6c shows a side view of a securing element according to a further embodiment;

FIG. 6 d shows a side view of a securing element according to FIG

Fig. 6c with an adjusting nut;

Figure 7 is a side view of the prop of the invention according to a preferred embodiment. The figures show a generally designated by the reference numeral 2 prop with an axial longitudinal direction 4, a concentric circumferential direction 6 and a radial

Direction 8. The prop 2 comprises an outer tube 10 extended in the longitudinal direction 4 and an inner tube 12 disposed therein. Furthermore, the prop 2 comprises an adjusting nut 14 which is captive in a longitudinal end region 16 of the outer tube 10 in a manner to be described in more detail, but in the circumferential direction 6 is rotatably disposed and by means of which the inner tube 12 is adjustable relative to the outer tube 10 in the axial longitudinal direction 4.

The outer tube 10 is in the course of rolling production with

at least one and according to a preferred embodiment according to Figures 2a and 2b provided with four in the axial direction 4 extending longitudinal guide grooves 18 and thereby has a non-circular profile. The Längsführungsnuten 18 open radially inward and are offset by 90 ° to each other. Are two or three longitudinal guide 18

provided, it may be appropriate for reasons of symmetry, these diametrically opposite or arranged to be offset by 120 ° to each other.

The inner tube 12 is a round tube with an external thread 20. It is provided in a preferred embodiment according to Figures 3a and 3b in a thread-free longitudinal end portion 22 with four radially outwardly projecting guide elements 24. The guide elements 24 are corresponding to the Längsführungsnuten 18 offset by 90 ° to each other. The

Guide elements 24 are integrally made of material of

Inner tube 12 formed by cutting at a lower edge 26 and bending radially inward. If the inner tube 12 is inserted in the outer tube 10, the guide elements 24 engage from radially inward into the Längsführungsnuten 18 a. The

Inner tube 12 is thereby arranged against rotation in the outer tube 10.

In a further preferred embodiment according to FIG. 3 c, the guide elements 24 are formed by two pins 54. The pins 54 are inserted through a respective opening 56 in the inner tube 12 and project radially outward. If the inner tube 12 is inserted in the outer tube 10, the radially outwardly projecting pins 54 engage from radially inward into the longitudinal guide grooves 18. The inner tube 12 is thereby arranged against rotation in the outer tube 10.

The adjusting nut 14 comprises a screwed onto the external thread 20 of the inner tube 12 internal thread 28 and a

Circumferential groove 30. Further, the adjusting nut 14 according to a preferred embodiment of Figure 4b comprises several,

in particular three, tool attachment points 32. Wing-like hammer abutment surfaces prove to be advantageous.

FIG. 5 shows the construction prop 2 according to the invention, wherein the inner pipe 12 is arranged in the outer pipe 10. The

Adjusting nut 14 is screwed onto the inner tube and sits according to the position shown in Figure 5 with a lower end 34 on an upper end 36 in the longitudinal end region 16 of

Outer tube 10 on. The guide elements 24 of the inner tube 12 engage in the Längsführungsnuten 18 of the outer tube 10 a. By turning the adjusting nut 14, the inner tube 12 adjusted in the axial longitudinal direction 4 relative to the outer tube 10. The guide elements 24 slide in the Längsführungsnuten 18, characterized moves the inner tube 12 by rotating the

Adjusting nut 14 translational relative to the outer tube 10th

At the same time the screwed into the adjusting nut 14 inner tube 12 is fixed by the adjusting nut 14 in the axial longitudinal direction 4, since the adjusting nut 14 to even closer to

descriptive way captive on the outer tube 10 is held. An undesirable translational on or failure of the inner tube 12 in or out of the outer tube 10 prevents, since the inner tube 12 can be adjusted only by turning the adjusting nut 14 in the longitudinal direction 4.

The adjusting nut 14 is shown in FIG 1 by means of a

Circlip 38 positively in the axial direction, but with play and circumferentially rotatably mounted on the outer tube 10. The securing ring 38 comprises the outer tube 10 and has according to Figure 6b with the non-circular profile of the

Outer tube 10 cooperating inner profile 40.

In a preferred embodiment, 10 support portions 42 are provided on the outer tube. FIGS. 2a and 2c in particular show the support sections 42 in the longitudinal end region 16 of FIG Outer tube 10. Preferably, the support portions 42 are integrally formed of material of the outer tube. The outer tube 10 is from axially above in the area between the

Longitudinal grooves 18 cut so that four tongue-like sections remain. These are bent in such a way that they form support sections 42 projecting radially outward. Preferably, first, the locking ring 38 is inserted from the top axially of the outer tube and then the

Support portions 42 are formed so that the locking ring 38 rests from axially below the support portions 42. If the inner tube 12 is positioned with the screwed adjusting nut 14 according to Figure 1 in the outer tube, the adjusting nut 14 sits from axially above on the support portions 42 and the radially inwardly foldable lugs 44 of the locking ring 38 are bent radially inwardly such that the lugs 44 engage in a circumferential groove 30 of the adjusting nut 14. The

Adjusting nut 14 is thus on the axial bottom of the

Supporting portions 42 adjacent retaining ring and held captive on the outer tube 10 via the engaging in the circumferential groove 30 lugs 44 of the locking ring. The lugs 44 engage with such play in the circumferential groove 30, so that the adjusting nut 14 is rotatable in the circumferential direction 6, and the inner tube 12 by turning the adjusting nut 14 relative to

Outer tube 10 in the longitudinal direction 4 is adjustable.

According to another preferred embodiment that is

Securing element 46 formed by the longitudinal end portion 16 of the outer tube 10. FIGS. 6c and 6d show the longitudinal end region 16 the outer tube 10 with foldable means 48. The outer tube 10 is cut from axially above in the region between the Längsführungsnuten 18, so that several foldable means 48 remain. These are bent in such a way that they form radially outwardly projecting sections 50 with lugs 52 which can be folded radially inward. The radially inward foldable lugs 52 engage in such a playful manner in the circumferential groove 30, so that the adjusting nut 14 is rotatable in the circumferential direction 6, and the inner tube 12 is adjustable by rotating the adjusting nut 14 relative to the outer tube 10 in the longitudinal direction 4.

Claims

claims

1. prop (2), with an axial longitudinal direction (4), a concentric ümfangsrichtung (6) and a

Radial direction (8), with an in the longitudinal direction (4) extended outer tube (10) arranged therein in the longitudinal direction (4) and extended over the

Outer tube (10) in the longitudinal direction (4) adjustable inner tube (12) with an external thread (20), characterized in that the outer tube (10) is a non-circular rolled tube »that the outer tube (10) in the course of Walz -Herstellung with at least one in the

Longitudinal (4) extending and radially inwardly opening guide groove (18) is provided that the

Inner tube (12) is a round tube and at least one radially outwardly projecting guide element (24), which engages in the radially inward open guide groove (18), so that the inner tube (12) thereby in ümfangsrichtung (6) positively against rotation in the

Outer tube (10) is arranged, and that in one

Longitudinal end region (16) of the outer tube (10) captive, but in the circumferential direction (6) rotatably an adjusting nut (14) with an external thread (20) of Innenxohrs (12) screwed internal thread (28) is arranged and that by turning the adjusting nut ( 14), the inner tube (12) relative to the outer tube (10) in the longitudinal direction (4) is adjustable, wherein the guide element (14) in the guide groove (18) slides.

2. prop (2) according to claim 1, characterized in that the outer tube (10) made of a steel alloy

manufactured and preferably galvanized.

3. prop (2) according to claim 1 or 2, characterized

characterized in that the inner tube (12) is preferably made of a steel alloy.

4. prop (2) according to one or more of the preceding claims, characterized in that the external thread (20) of the inner tube (12) in a non-cutting

Shaping process, in particular a thread rolling process or a thread rolling process,

is made,

5. prop (2) according to one or more of the preceding claims, characterized in that the outer tube (10) comprises a plurality, preferably two, three or four, in the longitudinal direction (4) extending guide grooves (18), and that the inner tube ( 12) accordingly several, preferably two, three or four, in these guide grooves (18) engaging guide elements (24).

6. prop (2) according to one or more of the preceding claims, characterized in that the

Guide element (24) of the inner tube (12) by a radially outwardly directed deformation of material of

Inner tube (12) is formed.

7. prop (2) according to one or more of the preceding claims, characterized in that the

Guide element (24) by cutting and then outward expansion or bending of material of the inner tube (12) is made.

8. prop {2} according to one or more of the preceding claims, characterized in that the

Guide element (24) in or on one in the outer tube

(10) arranged longitudinal end region (22) of the inner tube

(12) is formed.

9. prop (2) according to one or more of the preceding claims, characterized in that the

Guide element (24) of at least one through an opening (56) in the inner tube (12) inserted through and radially outwardly projecting pin {54) is formed.

10. prop (2) according to one or more of the preceding claims, characterized in that the adjusting nut (14) by means of a in the axial direction (4) positively on the outer tube (10) held securing element (46) in the axial direction (4) positively , however

play and in the circumferential direction (6) rotatable on

Outer tube (10) is arranged.

11. prop (2) according to one or more of the preceding claims, characterized in that the

Securing element (46) is a the outer tube (10) comprehensive circlip (38).

12. Support (2) according to one or more of the preceding claims, characterized in that the outer tube (10) in the longitudinal end region (16) has a support portion (42) for abutment of the securing element (46) from axially below, and that the support portion ( 42), preferably by cutting and bending material of the

Outer tube (10) is formed.

13. prop (2) according to one or more of the preceding claims, characterized in that the

Securing element (46) at least one, preferably a plurality, radially inwardly foldable lugs (44) which engage behind the adjusting nut (14) axially, preferably engage in a circumferential groove (30) of the adjusting nut.

14. prop (2) according to one or more of the preceding claims, characterized in that the

Longitudinal end region (16) of the outer tube (10) convertible means (48) which form a securing element (46) for the adjusting nut.

15. prop (2) according to one or more of the preceding claims, characterized in that the foldable means (48) of the longitudinal end portion (16) of the outer tube (10) from a radially outwardly projecting portion (50) with at least one radially inward in an axial rear handle with the adjusting nut (14) foldable approach (52) are formed.

16, prop (2) according to one or more of the preceding claims, characterized in that the adjusting nut (14) comprises a plurality, in particular three, Werkzeugansetzstellen (32), in particular wing-like hammer abutment surfaces.

17. prop {2} according to one or more of the preceding claims, characterized in that the outer tube (10) and / or inner tube (12) has a receptacle for a

Have foot plate and / or a top plate and the foot and / or top plate is formed such that another foot and / or head, in particular centric, can be attached thereto.